I could continue to invest a tonne of time into EA, drive up my stock price, but to what end? And if I miss a day, or worse, one of my investments miss a day, my stock dives or my portfolio does. Twitter and Facebook both don't require me to do anything at all on a day to day basis. I can check when I want, contribute when I want and ignore both when I feel like it. Foursquare and Empire Avenue are both quite addictive for the first little while (EA a few days and Foursquare a few weeks). After that, they lose their appeal. There just doesn't seem to be much to entice me to come back over and over. I've figured out the system and moved on, before my invites have even all been sent out... Not a good thing.
For a social site to be successful it needs one of two things (in my mind):
1. The flexibility to come and go as I please and not suffer when I miss a day or
2. Enough game mechanics to sustain interest and keep building upon my addiction.
Thoughts? What's your experience with EA (Or other social game sites) like?